[Severe gastric and duodenal ulcer after chemotherapy of mFOLFOX6 and bevacizumab].

A 74-year-old female had metastatic left inguinal lymph nodes 20 months after rectal amputation for cancer, and an attempt to adapt chemotherapy of mFOLFOX6/bevacizumab was made after resection of the nodes. She felt nausea 2 days and continued 1 week after starting chemotherapy. Then, an endoscopic examination revealed both active gastric and duodenal ulcers. Clipping and proton pump inhibitor medication was started. The ulcers healed to the healing stage at 18 days and to the scar stage at 28 days. Gastrointestinal complications often occur after chemotherapy, but severe ulcers are rarely reported. The chemotherapy included anti-VEGF antibody, but the ulcers have healed back to normal.